#183B83#183B83

#183B83 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.3% C 0.128 H 262.5°. Best body text is #FFFFFF at 10.54:1 contrast (WCAG AA passes).

Color values

HEX	#183B83
RGB	rgb(24, 59, 131)
HSL	hsl(220, 69%, 30%)
HSV	hsv(220, 82%, 51%)
CMYK	cmyk(81.7%, 55%, 0%, 48.6%)
CIE-LAB	lab(26.62, 15.77, -44.07)
CIE-LCH	lch(26.62, 46.80, 289.69°)
OKLab	oklab(37.29% -0.0168 -0.127)
OKLCH	oklch(37.29% 0.128 262.5)
XYZ	xyz(6.0359, 4.9601, 22.1076)
Luminance	0.0496 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B83 #836018

analogous

#187083 #183B83 #2B1883

triadic

#183B83 #83183B #3B8318

tetradic

#183B83 #831870 #836018 #18832B

square

#183B83 #831870 #836018 #18832B

split-complementary

#183B83 #832B18 #708318

monochromatic

#050C1C #0F244F #183B83 #2152B7 #3A6FDB

Accessibility & contrast

On white

10.54

#183B83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#183B83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B83

10.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B83	#FFFFFF	#000000	##FFFFFF
##183B83	1.00	10.54	1.99	10.54
#FFFFFF	10.54	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#034486

Deuteranopia (green-blind)

#003A82

Tritanopia (blue-blind)

#004D59

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #183b83;
/* rgb */ color: rgb(24, 59, 131);
/* oklch */ color: oklch(37.3% 0.128 262.5);

Tailwind

colors: {
  custom: {
    50: '#6870a8',
    500: '#183b83',
    950: '#000000',
  },
}

SCSS

$custom: #183b83;
$custom-light: #6870a8;
$custom-dark: #000000;

JSON

{
  "hex": "#183b83",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 131
  },
  "hsl": {
    "h": 220.374,
    "s": 69.032,
    "l": 30.392
  },
  "oklch": {
    "l": 0.37289,
    "c": 0.12813,
    "h": 262.5
  },
  "luminance": 0.04961
}

Semantic roles & 50–950 ramp

primary

#183B83

secondary

#B79040

accent

#B23CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #183B83

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →